Pulp-agitator.



W. HAMMOND.

PULP AGITATOR.

APPLICATION FILED 00T.13, 1911. 1,026,578. Patented May 14, 1912.

2 SHEETS-SHEET l.

wibneooeo 6] How 10,1

W. HAMMOND.

PULP AGITATOR.

APPLICATION FILED OOT.13, 1911.

Patented May 14, 1912.

SHEET 2.

2 SHEETS- form a part ofthis specification;

\ ticles of material from each other, whereby the aforesaid patents, andhence the condischarged at the top of the tank, thus formof the tank isintroduced through the in- NI D STATES I PATENT QFFIQE mom, or wmnn,rannsnvmrmnssrenoa r0 men men wonxs, or wnmm, rmmvnman conromrmn orrmmvnma.

" rimr-neruroa 1,026,578. Wcm w mm Pneumonia 14, 1912.

- Animation fled emu: 13,1911. Serial Io. cum. I

To all whom itmay concern: V f It is assumed that the is ori ally Be itknown that .1, WILLIAM Humour),

a citizen of the United States, residing at Warren, county of Warren,and State of Pennsylvania, have invented certain new and usefulImprovements in Pulp-Agita-' tors; and I do declarethe following tote" afull, clear, and exact description of the invention,'such as will enableothers-skilled in the art to which it appertainsto .nrake and use'thesame, reference being bad to'the accompanying drawings, and to thecharacters of reference marked thereon, which My invention relatestprimprovements iu pulp agitators of theclass set forthinPatents Nos.923,571, 940,612 and 1,000,689, being dated June 1st, 1909, November 16,1909, and August 15, 1911, respectively. 7

My present improvement relates more er; ticularly'to what I term crossagitatibhj don sisting in delivering jets of liquid into the pulp as itissues from the top of the stand; pipe, and also delivering jets ofliquid-into the pul from the standpipe at intermediate points etween itsupper and lower extremities w! 'aonisob tained, the same extending overthe entire cross sectional area of the agitation tank and servingtothoroughly separate the parthe metallic values are brought into such'intimate relation with the dissolving solution, as a solution ofcyanidof potassium, that an ideal result of the character sought is obtained.In other respects, the operation of the a paratus is substantially thesame, at least m a general way, as set forth in struction and operationof the entire apparatus will not be set forth in this application inextreme detail. 4

The apparatus, in its entirety, consists of ended standpipe,intowhich-the pulp drawn from an annular chamber in the upper partstrumentality of a rotary pum or other suitable means, the pulp so introuced being ing, m a general way, a circulation of the filled from thetop or otherwise and at the agitation of the charge, where the tank isused as asingle umt, is cuntinued amtif have been the precious metalliccvalfies thoroughly dissolved, after which the solid "matter is allowedto settle in the bottom of the tank, the clear solutionfconta' the.fnetalhc values bein'g drawn off, the said 'valuesbeing subsequentlyseparated from 5 thedissolving solution by any suitable form' ofprecipitation. This step, however, does not concern the presentinvention, which relates pprel V to featuresionproducingamore toforeindicate and to this en there is arranged above the top of the stand ipea perforated section of pipe preferaby arranged in the form ofa'horizontal coil,

,which' is connected b means of a pipe extending outside of e tank withthe conduit through whichjhe pulp isscarried t6 A the lower extremity ofthe standpipe, the outside pipe beihg elatiizely small and controlled bya valve, whereby only a comparaso -tively small portion of the pulp orsolution Ts'delivered to the perforated coil in the upper partof thetank. Sprays or jets of ='quid from this perforated pipe are deliveredinto the ulp as it issues from the top of the stan pipe and is carriedoutwardly in all directions 111 sheeted form, due

"to the location of abaflle platedirectl-y above. 7 c

due to the fact that movable sections of the standpipe are in theirlowermost position, whereby the said sections are in actual contact witheach other.

cured in each case to the upper or movable section of the standpipe, therings being so connected with the lower section that the rings may movewith the upper section, while the lower section remains stationary a.joint between the adjacent pulp lengthwise of the tank, or in a verticaldirection.

thus ope sections ot the standpipe, which is in regis- Inter- 90 fromthe top of the standpipe, the 95 These rings are seter with exitopenings formed in the said whereby, as soon as the section or sectionsof the standpipe are raised to their limit of movement, ets of solutionwill issue from the standpipe intermediate its extremities for thepurpose aforesaid.

Having briefly outlined my improved construction, ,1 W111 proceed todescribe the same in detail, reference beinglmade to the accompanyindrawing "in w ich is illustrated an e diment t ereof.

.In this drawing :-Figure 1 is a vertical section, taken through anagitating apparatus equip ed with my lmprovements.

iE Fig;\2\iS as agmentary vertical section of the standpipe, takenthrough one of the joints formed for the purposeofmtreducmg intermediatesprays or jets of solution from Atandpme intermediate its extremities.

go In this view, the uppersectiomof the pipe we; as r -Fview, showingthe joint in 1ts normal POSI- has been raised to .open communicationbetween the interior of the pipe and openings formed in a surroundingring, the parts being shownon a scale greatly enlarged as compared withFigrLnF i 3'isn mslm lar tion, or with the two pipe sections in actualcontact, whereby the openings or passages in the said ring are closed orcut oii from communication with the interior of the pipe. Fig. 4 is across section of the pipe, taken on the line fr-4: of Fig. 2, lookingdownwardly. e refemence characters indicate the same parts in all theviews. 7 4

Let the numeral 5 desigf :a I a ight cylindrical tank, whose lowerportion is cone-shaped, as shown at 6, the cone-shaped part beingsurrounded by a casing 7 which is a continuation of the body of the tankabove the cone-shaped bottom.

Centrally arranged and suspended within ,the tank is a standpipe 8, thesuspension being accomplished by means of horizon-r ,.tally=arranged"braces 9 connecting the wall of the tank with a ring 10, with which thestandpipe is equipped, and inclined braces 12, which are connected withthe pipe ring 10 at their lower extremities and with an angle bracket 13at their upper extremities, the angle bracket bein secured to the wallof the tank on the insi e. These suspension braces or rods 9 and 12 areprovided with turn buckles 14, whereby they may be adjusted to producethe required result. The top of the standpipe is further supported bymeans of screws 15, which are threaded in a cross bar '16, extendingacross the top. of

the tank and reinforced by a plate 17, in which is also threaded a screw18, whose lower extremity is equipped with abaflie plate 19 located ashort distance above the top of the standpipe. While these screws serveto suspend the standpipe in its into the contents 0 the tan-1rintermediate the extremities of the standpipe. For this purpose,relatively heav'y' rmgs v21 are Socured to the movable sections 20 byrivets 22,- or other suitable fastening devices. In the case of theuppermost section 20, the ring 21 is connected with the lowermostsection 20 by means of pins 23, which are made fast to the lower pipesection 20, as

through slots 25 formed in the lower portion gether with the uppermostsection 20, may be lifted the lengt of the slots 25 without jets,whereby the said" jetshave suiiicient force to act upon the pulp overthe entire fiuencing the material falling through the gangue andbringing the dissolving solution of cyanid of potassium into suchintimate values are quickly dissolved. Now, if it is desired tointroduce these cross jets or at more than one zone, after the uppermostbetween the two' sections 20 of the standpipe for the purpose aforesaid,the operation will be continued by imparting a further elevation to theuppermost section 20, in which 21 are in .the bottom of the slots 25,the lowermost section 20, or the section 20 next below the uppermostsection, will be lifted until a space 26 is formed between what may thestationary portion 28 of the standpipe below, assuming that thestandpipe is equipped with only two movable sections 20. The result willbe that the second section 20,

length of the slots 25 through which the pins 23 pass, thus opening aspace between ary section of the pipe and allowing thethe tank throughthe passages 27 with the result heretofore stated. From this, it'will beunderstood that the standpipe may be proper central position within thetank, they also are adapted to adjust the movable secprovided with oneor more movable sections,

tions 20 of thestandpip'e for the purpose of introducing cross s rays or-,jets of liquid shown at 24, the said pins protruding.

the secondsection 20 and the lower stationof the ring 21, whereby thering 21, to

moving the lowermost s ectionflQmrThisliit properly control thedirection of the issuing cross sectional area of the tank, thus inliquid..of the tankand p w lg gfiect separation of the metallic values rom thex contact with the metallic values that the said sprays ofli'qfiidin'to-the-pulpsf thetankmnd section 20 has been raised to open aspace 26 event, as the pins 23 of the uppermost ring be termed thesecond movable section 20 and 11 together with its ring 21, will belifted the liquid to pass from the pipe outwardly into the normalposition of the sections being 'with theinterior of the pose ofcrossagitation. w

The elevation-of the pipe sections for such that the openings orpassages 27 are closed, it being practicable, however, to place thesepassages in communication with the. mteriorof the pipe by thevertical-move ment first of the uppermost movable section,

and finally of the section next below, and so on until the desirednumberof series of jet openings 27 is placed in communication pipe, for.thepurthe purpose aforesaid, may be accomplished by adjusting thescrews 15, heretofore described, the lower extremities of the screwsbeing journaled in ears or'lugs 29, secured to the 'uppermost1section20for the purpose.

- It will be understood that as these screws are turned in the properdirection, the up-. permo'st movable section 20 will be lifted until.the pins '23 reach the bottom ofthe slots 25. ;Then, if the screws arefurther turned, the second movable section 20 of the standpipe will beraised until the bottoms of the slots 25 e a e'the pins 23 of the ring21 next below. movable sections 20 .will be so adjusted as to permit theissuing-of jets or sprays'ofliquid from the standpipe intothe'surrounding contents of the tank for purposes of additional or crossagitation, as heretofore explained. i a

As illustrated -in the drawing, the uppei: part of the tank is rovidedwith an mterior cylindrical partltion 30, which at the I the bottom, itis supported upon the angle top is secured to the cross bar 16, while atbrackets 13. This partition 30 forms an annular chamber .31, between theupper ortion of the wall of the tank .and the sai partition, thisannular chamber 31 forming a a quiet or undisturbed compartmentfor whatoff through a pipe 32, which extends first may be termed the clearsolution,.from which compartment the said solution may be drawnoutwardly from the tank and then downwardly, communicating with a rotarypump 33, from which the solution is discharged through a pipe 34 intothe bottom of the standpipe 8, the inner. extremit. of the pipe 34beingupturned and protru ing into the lower open extremity of thestandpipe, as shown at 35. This solution, during the operation of theapparatus, is carried up- 'wardly through the standpipe and dischargedat the top thereof, or, more properly speaking, results in producing acirculation of the contents of the tank upwardly through the standpipeand downwardly through the tank in a continuous circuit, the contents ofthe tank being drawn into the lower extremity of the standpipe andcarried upwardly therethrough under'the influence .of the suctionresulting from the discharge of the pipe 34 into the lower extremity ofthe standpipe. At the sametime that heretofore explained.

en this is, done, the two "the solution is circulating the standintermediately located sprays or jets 5 w I be Issu ng from thestandpipe at one or more zones, depending upon t of the movable sectionsof the'standpipe, as

tankvand-between the tank and the centrifugal pump 33, is an upwardlyextending relativelysmall pi 36, whose uppercxtremity communicates wayof a horizontal part 37 and a depen ing part 38 with a circularperforated pipe 39, arranged in a horizontal roximately in the 7 planejust above or same plane with the ba plate 19.

B virtue of this .construction, a portion pumpand delivered to. thepipe34 is'carried e adjustment Ccnnected with the pipe 34, outside ofthe 'of e solution issuing from the centrifugal upwardly through thepipe 36 and delivered -to;;the perforated" pipe 39 from which itissuesin-the form of sprays or jets i-nto the 'sheet'of solution issuingfrom the top of the standpi-pe; and thrown in all directions by thebaflie plate 19. Thesespra s or jets produce further cross agitation oft e contents of the tank, when taken in connection with the intermediate sprays or jets, producing perfect said patents, andheretofore described somewhat in detail, it is evident that the novelfeature of producing cross agitation by the employment of sprays or jetsof solution issuing from astandpipe intermediate its extremities andfrom a perforated pipe suspended in the upper part of the tank, eitheror both may be employed in connection with any agitating tank. having astandpipe through which a circulation of. solution is maintained by theintroduction of solution at the lower extremity of the standpipe andcausing it to discharge at the upper extremity thereof.

Connected with the top of the pipe 32 is a relatively small air pipe 41,whose upper extremity is open whereby,as the solution is drawn throughthe pipe 32 from the annular chamber 31, air issimultaneously introducedto the solution by the resulting suction. This air pipe is providedwitha valve 42, whereby the passage of air therethrough may be controlled.

The lower portion of the pipe 32 is connected with a branch pipe 43,provided with a valve 44. The dissolving solution, also the pul to betreated, may be introduced to the ta through this pipe. In order to dothis, it will only be necessary to open the valve 44 and start the pump33 in motion. In thisevent, the valve 40 would be closed. After thetreatment of a charge of pulp is completed, and the solid material hassettled in the cone-shaped bottom 6 of the tank,

this solid material may be removed through an outlet pipe 45 controlledby a valve 46.

Having thus described my invention, what -I claim is 1. Ina pulpagitator, the combination with a pulp-containing tank having an open-"the pipe, whereby the circulation of the pulp through the tank and pipeis estab-' lished, a ring mounted upon the said epipe and havingopenings which are adapt to be placed in communication with the pipe,

for the purpose set forth.

3. In a pulp agitator, the combination with a pulp-containing tank, ofan openended standpipe suspended in the tank and having avertically-adjustable section, an

exteriorly located ring applied to said section and movably connectedwith the pipe below the section, the said ring having open- .ingsnormally closed whenthe movable section is in its lowermost position,and means for elevating the movable section, whereby a space is formedbetween the section and the part of the pipe below the section for theescape of the liquid from the pipe through the openings in the ring,substantially as described.

- 4. The combination with a pulp-contaim ing tank having an open-endedstandpipe suspended therein, means for introducing liquid at the bottomof the standpipe,w-here by a circulation of the pulp is establishedthrough the tank and standpipe, the standpipe having a movable sectionprovided at its lower extremity with a member which surrounds theadjacent part of the pipe, the said member being movable on the pipebelow the movable section, the said member having pulp escape openingswhich are normally closed, and means for raisingthe movable pipesect-ion whereby the said openings are placed in communication with theliquid in the standpipe, for the purpose set forth.

' 5. The combination with a pulp-containing tank havlng an open-endedstand ipe suspended therem, and means for intro ucing liquid at thebottom of .the standpipe whereby a circulation of pul through thestandpipe and tank is establis ed, the standpilpe emg provided withmovable sections w ereby the pipe is vertically extensible, the movablesections'having openin adapted to be brought into communication with theinterior of the pipe when the sections are lifted, and suitab e meansfor raising the movable scribed.

6. The combination with a .pulp-contain-. ing tank, of a standpi esuspended in'said tank, means for intro ucing liquid "atthe. bottom ofthe i whereby a circulation ofthe pul is esta ished through the pipe andequipped with a ring secured to the lower extremity of the section andsurrounding the upper extremity of the adjacent part of the pipe, thesaid ring being connected with the upper extremity of the adjacent por:tion of the pipe to allow a limited vertical movement of the movablesection, the said ring having openings which are placed in communicationwith the pipe when the movable section is lifted, substantially asdescribed.

7. The combination with a pulp-contain-v ing tank having an open-endedstandpipe suspended therein, means for introducing liquid at the bottomof the standpipe,whereby' a circulation of pulp is established throughthe tank and standpipe, a per-" forated'pipe supported in the upper partof the tank adjacent the upper extremity of the standpipe, and means forintroducing liquid under pressure intothe said perforated pipe, wherebyjets of liquid are delivered by the perforated pi e into the materialissuing from the top -0 the standpipe, the tank being provided with aplate supported above the top of the standpipe, whereby the material isdeflected outwardly from the top of the pipe,-substantially asdescribed. a a

'8. The combination'with a pulp-containing tank, of an open-endedstandpipe suspended in the tank, means for introducing pipe sections,substantially as -de-.

liquid into the lower extremity of the pipe.

whereby a circulation of liquid through the tank and standpipe isproduced, the standpipe being equipped with means for intro ducing jetsof liquid into the surrounding pulp of the tank intermediate theextremities of the pipe, and a perforated pipe supported in the tankadjacent the top of the standpipe, and means for introducing liquidunder pressure into the perforated plpe, the perforations being arrangedto discharge jets downwardly 1ntothe pulp of-the tank, substantially asdescribed.

9. In a pulp agitator, the combination with a pulp-containing tankhavingan openended sectional standpipe, and means for introducing solutioninto the lower extank, t e pipe having a movable sect-ion tremity of thepipe, whereby the circulation of the ulpthrough the tank and pipe isestablis ed, a rin mounted upon a section of said pi e an having-openings which are adap to be laced inxor out of communicatlon with t epipe by means' of the vertical movement of said section, substantiallyas described.

10. The combination with a pulp-agitating tank having an open-endedstandpipe suspended therein, means for introducing liquid at the bottomof the standpi e, whereby a circulation of pulp is establis ed throughthe tank and" standpipe, a

.15 perforated pipe supported in the upper part of the tank ad acent theupper extremity of the standpipe, and means for introducing li uid underpressure into the ,said perforate pipe, whereby jets of liquid aredelivered by the perforated pipe mto lution into t elower extremity of'the'pipe the tank and pipe is establish and means secured to the saidpi the last-named means being reinforce by a horizontal flange throughwhich perforations extend for introducing liquid jets from the pipe intothe surrounding pulp, for the purpose set forth,

In testimony whereof I afiix my signature in presence of two witnesses.

' WILLIAM HAMMOND.

' Witnesses:

Mnzon B. Srrnwm, W. R. Sonnnnmmm.

whereby the circulation of the egulp through

